6 Pieces of Anodized Surgical Steel Industrial Barbell with Spikes Come Mix Colors This Item is An Industrial Barbell With Spikes. It Comes in Assorted Colors: Black, Blue, Green, And Rainbow (Acual Colors in the Picture May Vary According Our Inventory) Barbells Are Manufactured With Stainless Steel in High Quality 316L Surgical Steel (non Allergic) Barbell Dimensions: 14 Ga (1.6 mm) x 1.38" (35 mm) x 3/16" (5 mm)